Minimizing configuration changes in a fabric-based data protection solution

Abstract

A method, system, and apparatus of minimizing configuration of changes in a fabric-based data protection solution. In one embodiment, a method includes configuring a switch such that a write request to a primary storage device is transferred through a virtual initiator in the switch to the primary storage device and to a secondary storage device, and configuring the switch such that a read request from the secondary initiator of a data in the primary storage device appears as though the read request is coming from a physical initiator rather than the secondary initiator (e.g., such that system protocol may be bypassed because the switch intercepts a response having the data from the primary storage device through a virtual target which uses the virtual initiator of the switch to communicate the data to the secondary initiator rather than the physical initiator).

1. A method, comprising:
 configuring a switch such that a write request to a primary storage device is transferred through a virtual initiator in the switch to the primary storage device and to a secondary storage device; 
 configuring the switch such that a read request from a secondary initiator of data in the primary storage device appears as though the read request is coming from a physical initiator rather than the secondary initiator, such that at least one system protocol is bypassed because the switch intercepts a response having the data from the primary storage device through a virtual target which uses the virtual initiator of the switch to communicate the data to the secondary initiator rather than the physical initiator; 
 minimizing configuration of nodes of a continuous-backup system through the configuration of the switch and the interception of the response in the switch; and 
 wherein a binding between the primary storage device, the secondary storage device, the physical initiator, and the secondary initiator is created through a frame redirect zone in a switch fabric and through an application of a twenty-four bit Fiber Channel address of the physical initiator to the virtual initiator in the switch such that the virtual initiator appears to the primary storage devices as the physical initiator. 
 
     
     
       2. The method of  claim 1  wherein the write request originates from the physical initiator. 
     
     
       3. The method of  claim 2  wherein the write request is transferred to the virtual target in the switch before being transferred through the virtual initiator in the switch to the primary storage device and to the secondary storage device. 
     
     
       4. The method of  claim 1 , wherein the at least one system protocol is at least one of a Fiber Channel zoning protocol, logic unit number (LUN) masking protocol and a small computer system interface (SCSI) reservation protocol. 
     
     
       5. The method of  claim 4 :
 further comprising a plurality of physical initiators that access a single primary storage logic unit number (LUN); 
 wherein the secondary initiator is bound to each of the plurality of physical initiators and using the binding to bypass a SCSI reservation. 
 
     
     
       6. The method of  claim 5  wherein the secondary initiator bypasses the SCSI reservation by using a multipath module to perform read input/output operations. 
     
     
       7. The method of  claim 6  wherein the storage device can be presented across a plurality of backup servers. 
     
     
       8. The method of  claim 1  wherein the switch is part of a storage area network, and wherein the nodes include the physical initiator and the secondary initiator. 
     
     
       9. The method of  claim 1  wherein the data is a current state of information on the primary storage device. 
     
     
       10. The method of  claim 1  in a form of a machine-readable storage medium embodying a set of instructions that, when executed by a machine, causes the machine to perform the method of  claim 1 . 
     
     
       11. A system of a switch, comprising:
 a transfer module to communicate a write request to a primary storage device through a virtual initiator in the switch to the primary storage device and to a secondary storage device; 
 an intercept module to make a read request of a data in a primary storage device appear as though the read request is coming from a physical initiator rather than a secondary initiator, such that at least one system protocol is bypassed because the switch intercepts a response having the data from the primary storage device through a virtual target which uses the virtual initiator of the switch to communicate the data to the secondary initiator rather than the physical initiator; 
 an optimization module to minimize configuration of nodes of a continuous-backup system through the configuration of the switch and the interception of the response in the switch; and 
 wherein a binding between the primary storage device, the secondary storage device, the physical initiator, and the secondary initiator is created through a frame redirect zone in a switch fabric and through an application of a twenty-four bit Fiber Channel address of the physical initiator to the virtual initiator in the switch such that the virtual initiator appears to the primary storage devices as the physical initiator. 
 
     
     
       12. The switch of  claim 11  wherein the write request is transferred to the virtual target in the switch before being transferred through the virtual initiator in the switch to the primary storage device and to the secondary storage device. 
     
     
       13. The switch of  claim 11  wherein the at least one system protocol is at least one of a Fiber Channel zoning protocol, logic unit number (LUN) masking protocol and a small computer system interface (SCSI) reservation protocol. 
     
     
       14. The switch of  claim 11  wherein the switch is part of a storage area network, and wherein the nodes include the physical initiator and the secondary initiator. 
     
     
       15. The switch of  claim 11  wherein the data is a current state of information on the primary storage device.